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Influence of Urea on the Change of Soil Ph and Seedling Height of Rice

Md. Shahidul Haque
Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi-6205

Md. Kamrul Hasan
Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi-6205

N. M. Rahmatullah
Department of Agricultural Statistics, Sher-e- Bangla Agricultural University, Dhaka

Bikash C. Sarker
Department of Agricultural Chemistry and Biochemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur

B. S. Sultana
Scientific Senior Officer
Soil Resources Development Institute, Dinajpur, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted to observe the effect of urea on the changes of pH in the soil and growth of rice (BRRI Dhan27). Urea (80 kg ha^-1) was applied to one of the seedlings after 20 days of germination and the soil pH and length of rice were determined after 25 days of urea application. Soil pH was gradually decreased with increase rice grown in the control seedling. However, no changes of pH were found in the urea treated seedling up to 20 days of germination and were similar to the control. The pH of soil compared to the control falls gradually with increase rice growth. Seedling height was gradually increased in both the control and urea treated seedlings from the germination. However, higher length was found in the urea treated seedling. Up to 20 days of germination of rice, no differences of seedling height in the two seedlings were observed. This findings suggests that urea is the potent compound inducing growth of rice and pH measurements indicate the period where optimum uptake of urea is happened.

Keywords: Soil pH, BRRI Dhan27, Urea, Plant growth

Location: Laboratory of Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi-6205

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To observe the effect of urea on the changes of pH in the soil and growth of rice (BRRI Dhan27).

Methodology:

Plant Materials: In this study, we prepared seed beds grown with BRRI Dhan27 seeds. The seeds were collected from the near by Bangladesh Rice Research Institute (BRRI), Sympur, Rajshahi, Bangladesh. For germination of seed, light, watering and other essential requirements were implied. The efficiency of germination of seeds was 99 % from the observation. Plants in the control seedling were not treated with urea while the other seedling was treated with urea (80 Kg ha^-1). The plants grown in the seedlings were taken care of weed control. Determination of soil pH: 20 g soil was taken in a 250 ml beaker and 50 ml distilled water was added with the soil. The contents were thoroughly stirred with magnetic stirrer for half an hour. pH of the suspension was measured with a digital pH meter. Soil pH was determined before germination of seed, 20 days after application of urea. In the control seedling, pH was determined similarly before and after germination of seeds. Determination of seedling height: Seedling height was determined after germination and before and after 20 days of urea application. Seedling height was determined by using measuring scale in different stages of growth both in the control and urea exposed seedlings.

Source of Information: J. Soil. Nature. 2 (3):46-49, 2008

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Urea has stimulatory effect on growth of rice which is reciprocally related to the soil pH caused by the applied urea. The rate of uptake of amino nitrogen in the plant is also related to the availability of urea in the soil as well as with the disappearance of soil urea.

Knowledge Management: Journal